Ore sizer and concentrator.



1%. 7 3,019. PATBNTED JUNE 21, 1904.

. A. -H. PHINNEY.

ORE 'SIZER AND GO'NGENTR'ATOR.

APPLICATION r-ILnn um. 3;, 1903.

K0 MODEL.

Q Attorney UNITED STATES Patented J line 21, 1904.

PATENT OFFICE.

ORE SIZERAND CONCENTRATOR.

SPECIFICATION forming part of Letters Patent N 0. 763,019, dated June21, 1904.

Application filed August 31, 1903. Serial No. 171,416. (No model.)

To all whom it may concern:

Be it known that I, ANsEL H. PHINNEY, a citizen of the United States,residing at Turner, in the county of Arenac and State of Michigan, haveinvented certain new and useful Improvements in Ore Sizers andConcentrators; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention is an improved ore sizer and concentrator especiallyadapted for use for In the accompanying drawings, Figure 1 is a verticallongitudinal sectional view of an ore sizer and concentrator embodyingmy improvements. Fig. 2 is a top plan view of the same. Fig. 3 is atransverse sectional View of the same, taken on the plane indicated bythe line a a of Fig. 1.

In the embodiment of my invention I provide a vat or trough l, ofsuitable size, which in practice is usually about twenty feet long, fourfeet wide, and ten inches deep. bottom of the vat or trough is formed bya plurality of hoppers 2, which extend from end to end thereof, and thesides of which converge downwardly. Each ofsaid hoppers is provided atits lower end with a dischargeopening 3, controlled by a suitable valveor gate 4. The trough or vat is provided also with a false bottom 5,which extends from end to end and side to side thereof, the said falsebottom being formed of a number of longitudinally-disposed bars 6, whichare triangular inform and suitably spaced apart, as at 7, to admit ofthe passage of ores and other finely-ground material between them. Thesides of the said bars 6 converge upwardly, as shown. The trough or vatis supplied at one end with material at the surface of the liquid by apipe or other suitable duct 8 and is provided at its opposite end at thelevel of The Y thetop of the liquid with a discharge spout or lip 9. I

In the operation of my invention the material, together with water, isfed to the trough or vat by a supply-duct 8. The screen formed by thefalse bottom arrests the descent of the larger particles of quartz andother material. The rate of deposit from the liquid will be controlledby the factors of the size of the particles and also their specificgravity, the

, valves or gates 4. It will be understood that the material isthoroughly'washed as it passes through the trough or vat and that thelighter worthless particles are carried off by the water from the troughor vat, while the valuable ores or other heavier particles by specificgravity become precipitated in the hoppers. The triangular bars whichform the coarse bottom or screen by the provision of theirupwardly-converging sides facilitate the passage of the finer particlesthrough said screen. The said bars, in effect, constitute corrugationswhich are longitudinally disposed in the screen, and the spaces betweenthe bars, in effect, constitute openings in the screen. The said screencuts off the moving liquid in the vat from the still liquid in thehoppers and the corrugations 10 to prevent counter-currents, it beingdesirable that the solution should move at an even rate of speed fromthe inlet to the outlet of the vat. Such a motion is facilitated by thebars of the screen, and a finer deposit is received in each successivehopper. I do not desire to limit myself to this peculiar construction ofthe screen, and the same may be modified without departing from thespirit of my invention.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. An ore sizer and concentrator comprising a vat having a dischargeelement at one end, means at the opposite end to supply material,suspended in liquid, to the vat, a plurality of hoppers below the levelof thedischarge element and forming-a series of waterchambers, and ascreen forming a false bottom extending over the hoppers, and havinglongitudinally-disposed laterally-spaced screen elements extending belowthe water-level of the vat, said screen elements serving to form aseries of straight guiding-channels opening at the bottom into thehoppers and extending from the feed to the discharge ends of the device.

2. An ore sizer and concentrator comprising a vat having a dischargeelement at one end, a plurality of hoppers below the level of thedischarge element and forming a series of water-chambers, and a screenforming a false bottom extending over the hoppers and extending belowthe water-level of the vat, said screen being provided withlongitudinally-disposed bars spaced apart and having upwardlyconverginginclined sides, said bars forming a series of straight guiding-channelsopening at the bottom into the hoppers and extending from the feed tothe discharge ends of the devlce.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses. v

ANSEL H. PHINNEY. Witnesses:

GEO. H. HOLLISTER, AsA HOLLISTER.

